join several pdfs into one single using pdfunite

This is a simple way to join several pdf files into one single file, using pdfunite in GNU/Linux is really easy, just use this line in your terminal:

  pdfunite file1.pdf  file2.pdf filen.pdf out.pdf

few days ago, I need to do this as faster as I could and it really works, have this in mind ok, you never know

all the best